| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for annealing a plurality of coils while stacking the coils in the axial direction thereof, in which the temperature of the coils is elevated uniformly between the mutual coils and between the inside and outside of the coils without delay.SOLUTION: A plurality of metal strip coils each formed by winding a metal strip are placed in an annealing furnace while the center axes of the metal strip coils are aligned in the vertical direction, the metal strip coils are covered with an inner case, and the metal strip coils are annealed by radiation heat from the inner case. The annealing is carried out in a state where a plurality of the metal strip coils are stacked in the axial direction while the metal strip coils are spaced from each other. |
